Unpaywall

Legally get full text of scholarly articles as you browse.

What is Unpaywall?

'Unpaywall' is a handy research tool that helps users freely access full-text PDFs of scholarly articles. It scours the web for author-posted manuscripts legally hosted on university and government servers, often termed as 'Green Open Access'. Unpaywall strictly adheres to publisher permissions and excludes papers posted outside of these permissions from its index.

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Stats

By: https://unpaywall.org

View on Chrome Web Store

Users: 700,000+

Rating: 4.04 (229) ▲ 1 new ratings

Version: 3.98 (Last updated: 2021-07-30)

Creation date: 2020-02-28

Risk impact: Low risk impact

Risk likelihood: Very low risk likelihood

Manifest version: 2

Permissions:

*://*.oadoi.org/*
storage

Size: 683.01K

URLs: Website

Stats date:

Chrome-Stats Rank

# 649 ▼ 1

Other rankings

#2556 in Workflow & Planning ▼ 247

#10 in free access keyword 49 ▲ 3

#11 in article keyword 10 ▲ 20

#23 in legal keyword 4 ▼ 3

#32 in author keyword 9

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Other platforms

Unpaywall (v3.98)

4.37 (223) 63,586+

Not available on Edge

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Summary

Analyze keywords

Get full text of scholarly articles as you browse. When you view a research article, Unpaywall automatically looks for a copy in our index of 20 million free, legal fulltext PDFs. If we find one, click the green tab to read the article.

Unpaywall points you to legal, author-posted manuscripts that are hosted on university and government web servers. We are pointing to versions that have been posted with the full and explicit authorization of the publishers themselves.

These free, author-posted manuscripts are often called "Green Open Access" and are a longstanding and completely legal part of the scholarly communications ecosystem. The majority of scholarly journals permit authors to "self-archive" their papers on university and government web servers. It's these legally self-archived papers that Unpaywall helps users find. Any papers posted outside of publisher permissions are NOT included in our index.

User reviews

User reviews summary

These summaries are automatically generated weekly using AI based on recent user reviews. Chrome Web Store does not verify user reviews, so some user reviews may be inaccurate, spammy, or outdated.

Pros

Can find free versions of research papers/journals
Saves time searching for legal, open-access versions of articles
Simple and practical

Cons

Doesn't always detect available full versions of articles
Doesn't work on certain websites
Doesn't work on mainstream media sites like the Wall Street Journal

Most mentioned

Doesn't work
Works well
Can't always find free versions of articles
Saves time searching for legal, open-access versions

Recent reviews

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Kenya Otterholt, 2024-06-07

I was looking for a specific article that I had read some while ago and got to access it for free... when I tried recently it was all behind a paywall! This extension really helped me, and even if it can only get 50% of articles, or just the ones that are out there somewhere for free, it's really handy.